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 A249435 a(1) = 0, after which one less than prime powers p^m with exponent m >= 2. 2
 0, 3, 7, 8, 15, 24, 26, 31, 48, 63, 80, 120, 124, 127, 168, 242, 255, 288, 342, 360, 511, 528, 624, 728, 840, 960, 1023, 1330, 1368, 1680, 1848, 2047, 2186, 2196, 2208, 2400, 2808, 3124, 3480, 3720, 4095, 4488, 4912, 5040, 5328, 6240, 6560, 6858, 6888, 7920, 8191, 9408, 10200, 10608, 11448 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Charles R Greathouse IV, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A025475(n) - 1. PROG (Scheme) (define (A249435 n) (- (A025475 n) 1)) (PARI) list(lim)=my(v=List([0])); lim=lim\1+1; for(m=2, logint(lim, 2), forprime(p=2, sqrtnint(lim, m), listput(v, p^m-1))); Set(v) \\ Charles R Greathouse IV, Aug 26 2015 CROSSREFS One less than A025475. Subsequence of A181062 and also a subsequence of A249433 (after the initial zero). Union of sequences A000225, A024023, A024049, A024075, A024127, etc. without their term a(1). Apart from the first term, subsequence of A045542. Sequence in context: A309197 A076683 A045542 * A192120 A031404 A263519 Adjacent sequences:  A249432 A249433 A249434 * A249436 A249437 A249438 KEYWORD nonn AUTHOR Antti Karttunen, Nov 02 2014 STATUS approved

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Last modified February 17 00:49 EST 2020. Contains 331976 sequences. (Running on oeis4.)